There are a plethora of synonyms for the phrase "went in." Some commonly used alternatives for this action include "entered," "stepped inside," "walked into," "passed through the doorway," "went through the entrance," "crossed the threshold," "ventured in," "made an entrance," "stepped foot into," and "went inside." Depending on the context, these synonyms can add variety and descriptors to a sentence, creating a more engaging and vivid story. By using different synonyms, writers can also put emphasis on the action of entering, highlighting its significance in a given situation.